It was his sister

John couldn't speak. He knew that his sister was going to the same university as him, but he hadn't realized that Alicia was her roommate.

"Um, Crystal, I can explain," John said, rather lamely in his opinion.

His sister merely smirked. "Don't need to."

Alicia glared at her. "Do you mind? I'm in the middle of something."

Crystal continued to smirk. "Yes, I can see that. I guess you love my brother's cock, don't you?"

Alicia gasped. "Wait a minute! John, she's your sister? Why didn't you tell me?"

"I didn't know she was your roommate, Alicia. But as fascinating as this conversation is, we should get back to business. Crystal, would you mind?"

John began thrusting into Alicia again, eliciting moans from her. He tried to forget that Crystal was still there and he hoped she was going to leave. He kissed Alicia passionately, trying to drive his sister out of his thoughts.

"Fuck, John, you're so good," Alicia moaned.

He was so focused on Alicia that he didn't notice that Crystal had taken off her clothes and was now as naked as them.

As he continued to fuck Alicia, Crystal walked over to him and whispered in his ear. "After you're through with her, why don't you have sex with a real woman?"